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AssigneeChampion Microelectronic Corp.
InventorJeffrey H. Hwang
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A current inrush limiting technique for a switching power converter. In one aspect, a switching power converter includes a main power switch and a current sensor. When the input current exceeds a first threshold, the main power switch is opened. When the input current exceeds a second threshold, higher than the first threshold, a current-limiting resistance is coupled to receive the input current. Accordingly, the input current is limited in two stages by two different techniques. In another aspect, a bleed resistor receives current from a power source for providing power to a controller for the power converter. After start-up, such as when an output voltage of the power converter is available to provide power to the controller, the current-limiting resistor is shorted and the bleed resistor is effectively removed. A single pin of an integrated circuit controller controls shorting of the current-limiting resistor and removal of the bleed resistor.
A switching power converter comprising:
A switching power supply for drawing power from a source and for forming an output voltage, the switching power supply comprising:
A switching power supply for drawing power from a source and for forming an output switching power supply comprising:
Dependencies are inferred from the claim text.